Lightroom can relink moved files using the photo “!” icon or by right-clicking a folder and choosing Find Missing Folder, but that only fixes missing-path issues. It does not provide a way to manually clear the Metadata Conflict flag.

Based on the answers, Lightroom is detecting that the file’s metadata timestamp differs from what the catalog expects. That discrepancy may have happened earlier, and moving/relinking simply caused Lightroom to notice it.

In practice, there is no known Lightroom command to reset the conflict warning without choosing one of the offered actions. If you choose Import from Disk, catalog-only metadata like ratings, labels, and keywords may be lost. If you choose Overwrite Original Files, Lightroom writes its current metadata to the file/XMP; this normally does not alter the image pixels themselves, only metadata.

So the practical options are:

• relink the files/folders if needed,
• ignore the conflict warnings, or
• write Lightroom’s metadata back to the files if you want the warning resolved and are comfortable updating file metadata.